Concentration of Risk (Details) - Revenue	12 Months Ended
	Mar. 31, 2019 item customer	Apr. 01, 2018 item customer	Mar. 26, 2017 item customer
Customer Concentration Risk | Top ten customers
Concentration Risk
Number of customers | customer	10	10	10
Concentration risk (as a percent)	32.00%	28.00%	26.00%
Supplier Concentration Risk | Top ten suppliers
Concentration Risk
Number of suppliers | item	10	10	10
Concentration risk (as a percent)	48.00%	43.00%	41.00%
Supplier Concentration Risk | Largest commercial supplier
Concentration Risk
Concentration risk (as a percent)	16.00%	11.00%	10.00%
Supplier Concentration Risk | Largest retail supplier
Concentration Risk
Concentration risk (as a percent)	8.00%	10.00%	11.00%